NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Thu, Oct 1, 2026 at 9:20:22 pm CDT

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Excessive Rainfall Outlook

Rainfall Totals: Through Friday

Rainfall Totals: Saturday through Sunday

Extended Outlook

Current radar

Scattered to numerous showers and thunderstorms will result in the threat of heavy rainfall through Friday. Rainfall rates of 2 to 4 inches per hour will be possible in the heaviest storms.

Locally heavy rainfall could result in minor flooding. The greatest risk of flooding through Friday will remain over the far western counties including the Brazos Valley. The threat for heavy rainfall will shift south and east this weekend as a weak cold front moves slowly across the area.

This graphic shows the most likely and reasonable high end rainfall totals through Friday. The heaviest showers and thunderstorms are expected over the northern and western portions of southeast Texas, particularly over the Brazos Valley.

Scattered to numerous showers and thunderstorms are expected through the weekend as a slow moving cold front interacts with deep moisture over the area. The heaviest rainfall totals this weekend are expected over the coastal counties.

High rain chances will continue across SE TX through the weekend as deep moisture remains in place and a slow moving front crosses the region. Slightly cooler and drier weather are expected early to mid next week behind the front.

Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Bryan	20:35	Drizzle	10	74	73	98	ESE 7	-	29.89
College Station	20:53	Light Rain	10	75	74	96	ESE 8	-	29.88
Caldwell	20:35	Light Rain	7	73	73	100	ESE 6	-	29.88
Huntsville	20:53	Thunder In The Vicinity \ Mist \ Lightning Observed	4	73	72	96	ENE 7	-	29.91
Navasota	20:55	Rain \ Mist \ Lightning Observed	4	74	74	100	E 5	-	29.88
Brenham	20:55	Rain \ Lightning Observed	7	74	73	97	E 8	-	29.87
Conroe	20:53	Thunder In The Vicinity \ Heavy Rain \ Mist \ Lightning Observed	3	74	73	97	N 8	-	29.90
Cleveland	20:55	Lightning Observed	10	77	76	94	CALM	-	29.89
Liberty	20:55	Overcast	10	80	77	88	ESE 3	-	29.85
Columbus	20:55	Rain With Thunder In The Vicinity \ Lightning Observed	10	75	74	97	CALM	-	29.87
Spring	20:53	Thunder In The Vicinity \ Rain \ Mist \ Lightning Observed	2	74	73	97	NNW 7G18	-	29.87
Houston Intercontinental Aprt	20:53	Cumulonimbus Clouds, Lightning Observed	10	79	75	87	NW 9	-	29.86
Katy/Brookshire	20:55	Mist	1 1/4	73	73	100	N 15	-	29.88
Texas Medical Center Heliport	20:55	Lightning Observed	10	84	77	79	SE 12G18	94 [HI]	29.83
Sugar Land	20:53	Lightning Observed	10	77	75	93	N 10	-	29.84
Houston Hobby Airport	20:53	Mostly Cloudy	10	84	77	79	SE 8	94 [HI]	29.83
Arcola/Sienna	20:55	Lightning Observed	10	83	77	82	SE 3	92 [HI]	29.85
Pearland	20:53	Overcast	10	85	76	74	SE 7	94 [HI]	29.85
Ellington Field	20:54	Mostly Clear	10	84	77	79	SE 9	94 [HI]	29.83
La Porte	20:55	Lightning Observed	10	84	77	79	SSE 7	94 [HI]	29.86
Wharton	20:55	Light Rain	4	76	74	93	WNW 3	-	29.86
Galveston	07:46	Mostly Clear	10	82	73	74	SE 8	-	29.90
Bay City	20:55	Lightning Observed	9				E 7	-	29.79
Palacios	20:53	Clear	10	81	78	90	ESE 7	-	29.81
Rig 20 Miles SE of Galveston	20:55	Mostly Clear	10	86	77	74	SE 22	97 [HI]	29.87
Rig 20 Miles SE of Matagorda	20:55	Clear	10	86	78	79	SSE 12	98 [HI]	29.86

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